A Basic Application Could Not Be Started Wincc 7.5 |link| Jun 2026

If you are using WinCC 7.5 SP2, a known bug can cause this error. The solution is to ensure a stable network connection.

If none of the above steps resolve the issue, contact Siemens support for further assistance. Siemens support can provide additional troubleshooting steps or repair options.

In some instances, the problem is isolated to a specific project rather than the entire WinCC installation. Each WinCC project contains a .dcf (Data Configuration File) which stores configuration data. If this file becomes corrupted, it can prevent WinCC from opening that project. Deleting the .dcf file forces WinCC to regenerate a fresh copy, which often resolves the issue. A Basic Application Could Not Be Started Wincc 7.5

: Installing both WinCC V7.x and WinCC Professional (TIA Portal) on the same operating system is generally unsupported and frequently triggers this failure.

Open Windows File Explorer and navigate to the WinCC installation directory (typically C:\Program Files (x86)\Siemens\WinCC\bin\ ). Find the file named . Right-click the file and select Run as administrator . If you are using WinCC 7

The current Windows user account lacks assignment to the necessary Siemens security groups.

Ensure your current Windows login account is listed as a member in the following groups: SIMATIC HMI CS (Configuration Studio) Administrators (Local system administrator rights) If this file becomes corrupted, it can prevent

Right-click the Windows Start menu and select . Navigate to System Tools > Local Users and Groups > Groups . Locate the following groups: SIMATIC HMI SIMATIC HMI Viewer SQLServerMSSQLUser$ComputerName$WINCC

Look at the left navigation pane and click on .

WinCC writes detailed diagnostic logs when errors occur. These are typically found in the project's folder or C:\Program Files (x86)\Siemens\WinCC\log . Look for files indicating "A basic application could not be started".